Synchronization signal block transmission method, communication node and storage medium

Abstract

The present application provides a synchronization signal block (SSB) transmission method, a communication node and a storage medium. The method comprises: on the basis of a configuration parameter, determining a repetition pattern of repeated SSBs on at least one resource block set, wherein the repeated SSBs comprise N SSBs, N being a positive integer; and on the basis of the repetition pattern, transmitting the repeated SSBs on the resource block set within a selected bandwidth.

Description

Synchronous signal block transmission method, communication node and storage medium

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to the Chinese patent application filed with the China Patent Office on August 11, 2023, with application number 202311022710.X and invention name “Synchronization signal block transmission method, communication node and storage medium”. The entire contents of the Chinese patent application are incorporated herein by reference. Technical Field

[0003] The present application relates to the field of wireless communication technology, for example, to a synchronization signal block transmission method, a communication node and a storage medium. Background Art

[0004] In unlicensed sidelink (SL-U) communications, frequency-domain repetition of synchronization signal blocks (SSBs) can be used to meet the occupied channel bandwidth (OCB) requirements within a single resource block (RB) set and maintain the channel occupancy time (COT) across multiple RB sets. However, there is currently no effective solution for determining how to retransmit multiple SSBs.

[0005] Summary of the Invention

[0006] The present application provides a synchronization signal block transmission method, a communication node and a storage medium.

[0007] An embodiment of the present application provides a synchronization signal block transmission method, including: determining a repetition pattern of a repeated SSB on at least one resource block set according to configuration parameters, the repeated SSB including N SSBs, where N is a positive integer; and transmitting the repeated SSB on the resource block set within a selected bandwidth according to the repetition pattern.

[0008] An embodiment of the present application also provides a communication node, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the above-mentioned synchronization signal block transmission method when executing the program.

[0009] An embodiment of the present application also provides a computer-readable storage medium, on which a computer program is stored, and when the program is executed by a processor, the above-mentioned synchronization signal block transmission method is implemented. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] FIG1 is a flowchart of a synchronization signal block transmission method provided by an embodiment;

[0011] FIG2 is a schematic diagram of SSBs filled in a resource block set provided by an embodiment;

[0012] FIG3 is a schematic diagram of a mapping direction of a resource block set provided by an embodiment;

[0013] FIG4 is a schematic diagram of a first starting SSB provided by an embodiment;

[0014] FIG5 is a schematic diagram of a repeating pattern provided by an embodiment;

[0015] FIG6 is a schematic diagram of a repetition direction of a repeated SSB provided by an embodiment;

[0016] FIG7 is a schematic diagram of a repetition direction of a repeated SSB provided by an embodiment;

[0017] FIG8 is a schematic diagram of adjusting a gap value according to an embodiment;

[0018] FIG9 is a schematic structural diagram of a synchronization signal block transmission device provided by an embodiment;

[0019] FIG10 is a schematic diagram of the hardware structure of a communication node provided by an embodiment. DETAILED DESCRIPTION

[0020] The present application is described below in conjunction with the accompanying drawings and embodiments. It will be understood that the specific embodiments described herein are merely intended to explain the present application and are not intended to limit the present application. It should be noted that, unless there is a conflict, the embodiments and features in the embodiments of the present application may be combined with each other in any manner. It should also be noted that, for ease of description, only portions of the structure relevant to the present application are shown in the accompanying drawings, not all of the structures. The configuration described below should be understood to include both configuration and pre-configuration.

[0021] Figure 1 is a flowchart of a synchronization signal block transmission method provided by an embodiment. As shown in Figure 1, the method provided by this embodiment includes step 110 and step 120.

[0022] In step 110, a repetition pattern of a repeated synchronization signal block SSB on at least one resource block set is determined according to configuration parameters, wherein the repeated SSB includes N SSBs, where N is a positive integer.

[0023] In step 120, the repeated SSBs are transmitted on the set of resource blocks within the selected bandwidth according to the repetition pattern.

[0024] In this embodiment, the selected bandwidth includes at least the resource pool frequency domain bandwidth, the bandwidth part (Bandwidth part) bandwidth, the carrier bandwidth, the bandwidth of the current PSCCH (physical side link control channel) / PSSCH (physical side link shared channel) transmission, and one of the bandwidths selected by the UE. That is, the UE may not necessarily transmit all repeated SSBs, but may select SSB transmission within the aforementioned certain bandwidth based on the implementation. The configuration parameters can be used to indicate the position of the anchor SSB, the offset between the repeated SSB and the boundary or center of the RB Set, the gap (Gap, G) between the repeated SSBs, the repetition direction of the SSB and / or the repetition direction of the RB Set, the number of repetitions of the SSB in the repetition direction, the total number N of SSBs in the current resource pool set, the sequence number of the anchor SSB in the N SSBs in the current resource block set, etc. The configuration granularity of the aforementioned configuration parameters (the position of the anchor SSB, the offset between the repeated SSB and the boundary or center of the RB Set, the gap (Gap) between the repeated SSBs, the repetition direction of the SSB and / or the repetition direction of the RB Set, the number of repetitions of the SSB in the repetition direction, the total number N of SSBs in the current resource pool set, and the sequence number of the anchor SSB in the N SSBs in the current resource block set) can be the resource block set (RBset) level, the carrier level, the bandwidth part (Bandwidth Part, BWP) level, or the bandwidth level of the current PSCCH (Physical Side Link Control Channel) / PSSCH (Physical Side Link Shared Channel) transmission. According to the configuration parameters, the repetition pattern of the SSB on at least one resource block set can be determined, and the repetition pattern can be used to indicate the repetition pattern of the repeated SSB within the RB Set and the positional relationship between the RB Sets. According to the repetition pattern, the repeated SSB can be transmitted on one or more RB Sets, thereby meeting the OCB requirements and maintaining the COT of the RB set. A repeated SSB includes N SSBs, and the SSB can also be expressed as an S-SSB.

[0025] In one embodiment, the configuration parameter is used to indicate the frequency domain position of the anchor SSB within the resource block set and the gap (Gap) between two adjacent SSBs. For example, the configuration parameter may indicate that the anchor SSB is the first, last, or one in the middle of the N SSBs. The configuration parameter may be configured or pre-configured by higher-layer signaling (such as the Absolute Radio Frequency Channel Number (ARFCN) of the SSB).

[0026] In one embodiment, the configuration parameters further include at least one of the following: a filling direction in the resource block set; a number of SSBs corresponding to the filling direction; a total number N of SSBs in the current resource pool set; a sequence number of the anchor SSB in the N SSBs in the current resource block set; and determining a repetition pattern of the repeated SSBs on at least one resource block set based on the configuration parameters includes one of the following:

[0027] Starting from the anchor point SSB, fill the SSB in the direction of increasing resource block index. If the boundary of the resource block set is reached in the direction of increasing resource block index, continue filling the SSB from the anchor point SSB in the direction of decreasing resource block index until N SSBs are filled.

[0028] Starting from the anchor point SSB, fill the SSB in the direction of decreasing resource block index. If the boundary of the resource block set is reached in the direction of decreasing resource block index, continue filling the SSB from the anchor point SSB in the direction of increasing resource block index until N SSBs are filled.

[0029] Starting from the anchor point SSB, the SSBs are filled synchronously and symmetrically in both increasing and decreasing directions of the resource block index until N SSBs are filled. If any direction reaches the boundary of the resource block set, the filling in the direction is stopped.

[0030] Starting from the anchor point SSB, SSBs are filled synchronously and symmetrically in both increasing and decreasing directions of the resource block index until N SSBs are filled. If the number of SSBs filled in any direction reaches the number of SSBs corresponding to the direction, filling in the direction is stopped.

[0031] According to the sequence number of the anchor SSB in the current resource block set and the total number of SSBs in the current resource block set, determine the number of SSBs N1 in the increasing direction of the anchor SSB resource block index and the number of SSBs N2 in the decreasing direction of the resource block index, and fill the corresponding number of SSBs in the increasing and decreasing directions of the resource block index according to N1 and N2 respectively.

[0032] The interval between the newly filled SSB and the adjacent SSB is the interval between two adjacent SSBs in the configuration parameters.

[0033] FIG2 is a schematic diagram of SSBs filled in a resource block set provided by an embodiment. FIG2 shows three filling methods, and the S-SSB indicated by the arrow can be called the anchor SSB. As shown in the leftmost column of FIG2 , starting from the anchor SSB, the SSB is filled in the direction of decreasing resource block index (upward in FIG2 ). If the boundary of the resource block set is reached after the direction of decreasing resource block index (8 SSBs are filled), then (1) SSB is continued to be filled in the direction of increasing resource block index (downward in FIG2 ) starting from the anchor SSB until N (N=10) SSBs are filled; as shown in the middle column of FIG2 , starting from the anchor SSB, the SSB is filled in the direction of increasing resource block index. If the boundary of the resource block set is reached after the direction of increasing resource block index (2 SSBs are filled), then (1) SSB is continued to be filled in the direction of decreasing resource block index starting from the anchor SSB. Continue filling (7) SSBs until N (N=10) SSBs are filled. The number of SSBs filled in the above-mentioned increasing direction (2) can be implicitly derived through the sequence number of the configured SSB in the total number of repeated SSBs (N=10) SSBs or explicitly configured (i.e., the number of SSBs filled in the increasing direction is configured to be 2); as shown in the rightmost column of Figure 2, starting from the anchor point SSB, the SSBs are synchronously and symmetrically filled in both the increasing and decreasing directions of the resource block index, wherein, after reaching the boundary of the resource block set in the direction of increasing the resource block index (filling 3 SSBs), 6 SSBs are filled in the direction of decreasing the resource block index, and a total of N SSBs are filled. The number of SSBs filled in the above-mentioned increasing / decreasing direction (3 / 6) can be implicitly derived through the sequence number of the configured SSB in the total number of repeated SSBs (N=10) or explicitly configured (i.e., the number of SSBs filled in the increasing direction is configured to be 3, and the number of SSBs filled in the decreasing direction is configured to be 6). The boundary of the resource block set can be determined based on the RB index, or based on the number of SSBs that can be filled in the corresponding filling direction.

[0034] In one embodiment, the at least one resource block set is determined by configuration parameters, and the configuration parameters include at least one of the following: the number of resource block sets (M); the frequency domain configuration of the resource pool; the frequency domain configuration of the carrier; and the frequency domain configuration of the bandwidth part (Bandwidth Part, BWP).

[0035] In one embodiment, the configuration parameter includes a position of an anchor resource block set and / or a position of the anchor resource block set in the at least one resource block set.

[0036] In one embodiment, the configuration parameters include at least one of the following: the mapping direction in the resource block set; the number of resource block sets corresponding to the mapping direction; the number of SSBs in the resource block set; the interval between adjacent SSB resources; the frequency domain position of the anchor SSB in the current resource block set; the frequency domain position of the first starting SSB in the current resource block set; the frequency domain position of the center frequency points of all SSB valid RBs in the current resource block set in the current resource block set.

[0037] The configuration parameters include a mapping direction in the resource block set and / or the number of resource block sets corresponding to the mapping direction. FIG3 is a schematic diagram of a mapping direction for a resource block set provided in one embodiment. As shown in FIG3 , the mapping direction of the resource block set includes a direction that increases toward the resource block set index and / or the resource block index in the resource block set, and a direction that decreases toward the resource block set index and / or the resource block index in the resource block set. The number of resource block sets corresponding to the two mapping directions is 1 and 3, respectively.

[0038] The configuration parameters include the sequence number (I=2) of the anchor resource block set in the resource block set in the at least one resource block set, and the total number of resource block sets included in the at least one resource block set (M=5).

[0039] Determining a repetition pattern of repeated SSBs on at least one resource block set according to the configuration parameters includes one of the following:

[0040] Starting from the anchor resource block set, the resource block set is mapped in the direction of increasing resource block set index and / or resource block index in the resource block set. If the direction of increasing resource block set index and / or resource block index in the resource block set reaches the boundary of the bandwidth where the resource block set is located (resource pool frequency domain bandwidth, bandwidth part (Bandwidth part) bandwidth, carrier bandwidth, current PSCCH (physical side link control channel) / PSSCH (physical side link shared channel) transmission bandwidth, one of the bandwidths selected by UE), the resource block set is continued to be mapped from the anchor resource block set in the direction of decreasing resource block set index and / or resource block index in the resource block set until M=5 resource block sets are mapped.

[0041] Starting from the anchor resource block set, the resource block set is mapped in the direction of decreasing resource block set index and / or resource block index in the resource block set. If the direction of decreasing resource block set index and / or resource block index in the resource block set reaches the boundary of the bandwidth where the resource block set is located (resource pool frequency domain bandwidth, bandwidth part (Bandwidth part) bandwidth, carrier bandwidth, current PSCCH (physical side link control channel) / PSSCH (physical side link shared channel) transmission bandwidth, one of the bandwidths selected by UE), the resource block set is continued to be mapped from the anchor resource block set in the direction of increasing resource block set index and / or resource block index in the resource block set until M=5 resource block sets are mapped.

[0042] Starting from the anchor resource block set, the resource block set is synchronously and symmetrically mapped in two directions of increasing and decreasing resource block indexes and / or resource block indexes in the resource block set until M = 5 resource block sets are mapped. If any direction reaches the boundary of the bandwidth where the resource block set is located ((resource pool frequency domain bandwidth, bandwidth part (Bandwidth part) bandwidth, carrier bandwidth, current PSCCH (physical side link control channel) / PSSCH (physical side link shared channel) transmission bandwidth, one of the bandwidths selected by the UE)), the mapping in the direction is stopped.

[0043] Starting from the anchor resource block set, the resource block set is synchronously and symmetrically mapped to the resource block set index and / or the resource block index in the resource block set in both increasing and decreasing directions until M resource block sets are mapped. If the number of resource block sets mapped in any direction reaches the number of resource block sets corresponding to the direction (3 and 1 respectively according to the above configuration), the mapping in the direction is stopped.

[0044] Based on the sequence number of the anchor resource block set in the at least one resource block set (I=2) and the total number of resource block sets in the at least one resource block set (M=5), the number of resource sets to which the anchor resource block set is mapped in an ascending direction (N1=1) and the number of resource sets to which the anchor resource block set is mapped in a descending direction (N2=3). The sequence numbers of the mapped resource sets are continuous.

[0045] In one embodiment, the configuration parameters include at least one of the following: the mapping direction in the resource block set; the number of resource block sets corresponding to the mapping direction; the number of SSBs in the resource block set; the interval between adjacent SSB resources; the frequency domain position of the anchor SSB in the current resource block set; the frequency domain position of the first starting SSB in the current resource block set; the frequency domain position of the center frequency points of all SSB valid RBs in the current resource block set in the current resource block set.

[0046] Figure 4 is a schematic diagram of a first starting SSB provided by an embodiment. As shown in Figure 4, according to the above configuration parameters, it is determined that the frequency domain position of the center frequency of all SSB valid RBs in the current resource block set is the 29th RB in the current resource block set. The SSB containing this RB can be used as the first starting SSB, and its frequency domain position information in the current resource block set needs to be determined. This information includes at least the number of SSBs in the direction of increasing the SSB resource block index N1=1, and the number of SSBs in the direction of decreasing the resource block index N2=1 and / or its absolute frequency information. The aforementioned N1 and N2 can also be configured. Determine the frequency domain position of the resource block containing the center frequency of the target resource block set, and the frequency domain position information includes absolute frequency information and / or resource block sequence information.

[0047] The first starting SSB of the resource block with serial number 29 is placed at the resource block position containing the center frequency point of the target resource block set. Specifically, the resource block with serial number 29 is overlapped with the resource block position containing the center frequency point of the target resource block.

[0048] The filling in the direction of increasing SSB resource block index is N1=1 SSB, and the filling in the direction of decreasing resource block index is N2=1 SSB.

[0049] The first starting SSB may also be the SSB containing the resource block with the lowest resource block index in the current resource block set, the SSB containing the resource block with the highest resource block index in the current resource block set, the SSB containing the resource block closest to the boundary of the current resource block set, the SSB containing the resource block closest to the boundary of the current resource block set, or the SSB containing the resource block whose current resource block set index is the center frequency / center sequence number of the current resource block, wherein the center frequency resource block is the frequency point obtained by rounding up or down the average of the highest frequency point and the lowest frequency point of the current resource block set, and the center sequence number resource block is the frequency point obtained by rounding up or down the average of the highest sequence number and the lowest sequence number of the current resource block set.

[0050] In one embodiment, the bandwidth of the resource block set includes the resource pool frequency domain bandwidth, the bandwidth portion, the carrier bandwidth, and the current physical side link control channel PSCCH or physical side link shared channel PSSCH transmission bandwidth.

[0051] In one embodiment, the configuration parameter includes an offset of the repeated SSB relative to a boundary of the resource block set or a center of the resource block set.

[0052] The resource blocks corresponding to the repeated SSBs are all within the resource block set.

[0053] In this embodiment, the communication node (such as UE) may attempt to determine a corresponding offset value from the upper end and / or lower end of the RB Set, and select a repetitive pattern that allows all S-SSB RBs to be in the RB set.

[0054] In one embodiment, determining the repetition pattern of repeated SSB on at least one resource block set based on the configuration parameters includes: in different resource block sets, determining the position of the first repeated SSB according to the offset; and determining the position of the non-first repeated SSB based on the position of the first repeated SSB and the gap value.

[0055] In this embodiment, the communication node can determine the offset of the repeated SSB relative to the upper end or lower end of an RB Set. In another RB Set, the first repeated SSB can also be determined according to this offset, and the positions of other repeated SSBs can be obtained using the determined gap.

[0056] FIG5 is a schematic diagram of a repetition pattern provided by an embodiment. Determine the offset of a certain RB (for example, the RB closest to the boundary) contained in a certain SSB in the repeated SSB (for example, the SSB closest to the boundary) relative to the boundary, and determine the position of the SSB in another RB set according to this offset. The SSB is not necessarily the S-SSB indicated by the ARFCN. As shown in FIG5 , taking N=10 and Gap=5 as an example, in RB Set 1, the offset of the first repeated SSB relative to the upper end of the RB Set is 3 RBs (the length indicated by the downward arrow), and the gap between each repeated SSB is 5 RB. In RB Set 2, the offset of the first repeated SSB relative to the upper end of the RB Set is also 3 RBs, and the gap between each repeated SSB is also 5 RB.

[0057] In one embodiment, the configuration parameters further include a repetition direction of the non-first repeated SSB relative to the first repeated SSB.

[0058] Figure 6 is a schematic diagram of the repetition direction of repeated SSBs provided by one embodiment. As shown in the left column of Figure 6, in RB Set 1, the offset between the anchor SSB and the upper boundary of the RB Set is 45 RBs (the length indicated by the downward arrow). Starting from the first repeated SSB (including the anchor SSB), the repeated SSBs can be filled in the direction of decreasing resource block index (upward as indicated by the hollow arrow in Figure 6) according to the gap (5 RBs) to obtain each repeated SSB. As shown in the left column of Figure 6, in RB Set 1, starting from the first repeated SSB (including the anchor SSB), the repeated SSBs can be filled in the direction of decreasing resource block index (downward as indicated by the hollow arrow in Figure 6) according to the gap (5 RBs) to obtain each repeated SSB. Assuming that the anchor SSB indicated by the ARFCN is located within a repeated SSB that coincides with a certain boundary, extending the repeated SSB in different directions will result in different repetition patterns. Therefore, the configuration parameters can include the direction in which the repeated SSBs are added.

[0059] In one embodiment, the configuration parameters also include a gap value for repeated SSBs, and the gap value is greater than 0 (the corresponding repetition direction is the direction of increasing resource block index or resource block set index) or less than 0 (the corresponding repetition direction is the direction of decreasing resource block index or resource block set index).

[0060] In one embodiment, among the candidate values ​​of the gap value, the number of candidate values ​​smaller than 0 is less than or equal to the number of candidate values ​​greater than 0.

[0061] In one embodiment, the configuration parameters further include the number of repeated SSBs.

[0062] In one embodiment, the method of determining the repetition pattern of the repeated SSB on at least one resource block set based on the configuration parameters further includes: when any repeated SSB reaches the boundary of the resource block set, taking the modulo of the sum of the resource block sequence number and the gap value of the characteristic resource block in the repeated SSB and the function value of a specified function to obtain the position of the characteristic resource block in the next repeated SSB, wherein the specified function is a function of adding one or subtracting one to the number of resource blocks in the resource block set.

[0063] In this embodiment, in order to solve the cross-border problem, the following formula can be used to determine the position of the characteristic RB in the repeated SSB in the next repeated SSB: (f+G) mod f(N RB set ±1), where f is the resource block number of the characteristic resource block, G is the gap value, and f() is a specified function.

[0064] In one embodiment, the sizes of different resource block sets are not equal; the determining of the repetition pattern of the repeated SSB on at least one resource block set based on the configuration parameters includes: in each resource block set, determining the position of the specified SSB according to the offset; and determining the position of the repeated SSB in the non-first resource block set based on the position of the specified SSB in the first resource block set and the gap value.

[0065] Figure 7 is a schematic diagram of determining repeated SSBs in different resource block sets based on a specified SSB, provided by one embodiment. As shown in Figure 7, a specific SSB in the RB Set to be repeated (a first RB Set, such as RB Set 1) and its corresponding RB position are first determined. The position of the specified SSB after repetition in the RB Set to be repeated (a second RB Set, such as RB Set 2) is determined based on the distance between the SSB position and the RB Set boundary. The positions of the remaining SSBs are then determined based on the Gap. As shown in the middle column of Figure 7, RB 45 in RB Set 1 has an offset of 3 from the lower boundary of RB Set 1. Therefore, in RB Set 2, the specified SSB has an offset of 5 from the lower boundary of RB Set 2 (offset 5 equals offset 3). Based on this, the other SSBs in RB Set 2 can be determined according to the Gap. As shown in the rightmost column of Figure 7, the RB closest to the upper boundary in RB Set 1 (RB 8) has an offset of 4 from the upper boundary of RB Set 1. Therefore, in RB Set 2, the RB closest to the upper boundary has an offset of 6 from the upper boundary of RB Set 2 (offset 6 equals offset 4). Based on this, the other SSBs in RB Set 2 can be determined according to the Gap.

[0066] In this embodiment, the sizes of the RB Sets may be different. In one embodiment, the designated SSB satisfies: the repeated SSBs in the resource block set are not in a guard band.

[0067] In this embodiment, a designated SSB can be selected, which is not necessarily the SSB indicated by the ARFCN. In Figure 7, if the designated SSB is the SSB containing the lowest RB number, the repeated SSB position corresponds to Gap < 0, which meets the OCB requirement and is in the RB set; the value of Gap < 0 is not greater than the value of Gap >.

[0068] If the designated SSB contains the SSB with the highest RB number, and the Gap > 0 for the repeated SSB position corresponds to OCB requirements, the OCB requirement can be met. However, some S-SSBs in a repeated RB set may be in the guard band. This situation can be resolved through configuration. By selecting a specific SSB, it is ensured that no portion of the RBs in the repeated SSB falls within the guard band. In other words, the repeated SSB is not expected to contain RBs in the guard band.

[0069] In one embodiment, transmitting the repeated SSB on the set of resource blocks according to the repetition pattern includes:

[0070] When the repeated SSB in the non-first resource block set includes T resource blocks in the guard band and T is less than a set threshold, the SSB in the guard band is discarded, and the repeated SSBs except the SSB in the guard band are transmitted on the resource block set within the selected bandwidth according to the repetition pattern.

[0071] In this embodiment, for the case where a specific SSB is not selected: an SSB and its RBs are randomly selected in the first RB Set, for example, the SSB containing the RB closest to the boundary and the RB closest to the boundary, or the SSB indicated by the ARFCN and the SSB with the largest / smallest / middle sequence number, where the sequence number of the middle RB can be obtained by summing and averaging the RBs with the highest and lowest sequence numbers, or the SSB containing the RB with the largest / smallest RB sequence number and this RB; then, an offset is determined and the starting RB and the SSB containing this RB are obtained accordingly in the second RB Set. If the repeated SSBs in the second RB Set include RBs located in the guard band, and N is less than a (pre-)configured threshold T, then the repeated SSBs can be transmitted in the second RB Set, and the RBs located in the guard band are discarded. If the threshold is greater than the value of the repeated SSB, the SSB containing the RB with the RB sequence number farthest from this RB can be used as the starting SSB, and the RB with the RB sequence number farthest from this RB is used to determine the offset (as shown in Figure 7).

[0072] Alternatively, for the case where a specific SSB is not selected: an SSB and its RBs are randomly selected in the first RB Set, for example, the SSB containing the RB closest to the boundary and the RB closest to the boundary, or the SSB indicated by the ARFCN and the SSB with the largest / smallest / middle sequence number, where the sequence number of the middle RB can be obtained by summing and averaging the RBs with the highest and lowest sequence numbers, or the SSB containing the largest / smallest RB sequence number and this RB, and then determining the offset and using it to obtain the starting RB and the SSB containing this RB in the second RB Set. The receiving UE blindly detects all possible combinations.

[0073] In one embodiment, transmitting the repeated SSBs on the set of resource blocks within the selected bandwidth according to the repetition pattern includes:

[0074] In the case where the repeated SSB in the non-first resource block set includes T resource blocks in the guard band, the gap value is adjusted to a maximum value whose absolute value is greater than 0 and meets the set requirements, and the set requirements include that the repeated SSB in the non-first resource block set is not in the guard band.

[0075] In this embodiment, for the case where a designated SSB is not selected: For the case where a designated SSB is not selected: In the first RB Set, any SSB and any RB therein are selected, for example, the SSB including the RB closest to the boundary and the RB closest to the boundary, or the SSB indicated by the ARFCN and the SSB with the largest / smallest / middle sequence number therein, where the sequence number of the middle RB can be obtained by summing and averaging the RBs with the highest and lowest sequence numbers, or the SSB including the RB with the largest / smallest RB sequence number and this RB, and then determining the Offset and obtaining the starting RB and the SSB including this RB in the second RB Set accordingly. If the repeated SSB in the second RB Set includes an RB located in the guard band, the Gap value in this RB Set is reduced to a Gap value having an absolute value greater than 0 and the largest absolute value, and which can ensure that no RB located outside the guard band appears.

[0076] In one embodiment, the gap value is adjusted to a maximum value whose absolute value is greater than 0 and meets the requirements, including: reducing the gap value by floor({A+B} / (N-1)), where A is the number of resource blocks located in the guard band near the upper boundary of the non-first resource block set, B is the number of resource blocks located in the guard band near the lower boundary of the non-first resource block set, N is the number of repeated SSBs, and floor is rounded down.

[0077] In this embodiment, A and B are the number of RBs in the guard band near the upper and lower boundaries, respectively. If there are no RBs in the guard band, the corresponding A and B values ​​are both 0. The possible value for Gap reduction is floor({A+B} / (N-1)), where N is the number of repeated SSBs. Figure 8 is a schematic diagram of adjusting the gap value provided by one embodiment. As shown in Figure 8, if Gap = 28, then A = 0 and B = 2 in RB Set 2; reducing Gap by 2 (Gap = 26) means A = 0 and B = 0.

[0078] The present application also provides a synchronization signal block transmission device. FIG9 is a schematic diagram of the structure of a synchronization signal block transmission device provided by one embodiment. As shown in FIG9, the synchronization signal block transmission device includes:

[0079] A determination module 210 is configured to determine a repetition pattern of a repeated synchronization signal block SSB on at least one resource block set according to a configuration parameter, wherein the repeated SSB includes N SSBs, where N is a positive integer;

[0080] The transmission module 220 is configured to transmit the repeated SSB on the set of resource blocks within the selected bandwidth according to the repetition pattern.

[0081] In the synchronization signal block transmission apparatus of this embodiment, configuration parameters may be used to indicate the anchor point SSB, the offset between the repeated SSB and the boundary of the RB Set, the gap (Gap) between repeated SSBs, the repetition direction of the SSB, and / or the repetition direction of the RB Set. A repetition pattern of the SSB across at least one resource block set is determined based on the configuration parameters. The repetition pattern may be used to indicate the repetition pattern of the repeated SSB within the RB Set and the positional relationship between the repeated SSBs across the RB Set. Based on the repetition pattern, the repeated SSB may be transmitted across one or more RB Sets, thereby satisfying OCB requirements and maintaining the Coordinated Time (COT) of the RB Set.

[0082] In one embodiment, the selected bandwidth includes at least one of the resource pool frequency domain bandwidth, the bandwidth portion, the carrier bandwidth, the bandwidth of the current physical side link control channel PSCCH or the physical side link shared channel PSSCH transmission, and the bandwidth selected by the communication node.

[0083] In one embodiment, the configuration parameter includes an anchor point parameter, and the anchor point parameter is used to indicate the frequency domain position of the anchor point SSB in the resource block set and the gap (Gap) between two adjacent SSBs.

[0084] In one embodiment, the configuration parameters further include at least one of the following: a filling direction in the resource block set; the number of SSBs corresponding to the filling direction; the total number N of SSBs in the current resource pool set; and the sequence number of the anchor SSB in the N SSBs in the current resource block set.

[0085] The determination module 210 includes an SSB determination unit configured as one of the following:

[0086] Starting from the anchor point SSB, fill the SSB in the direction of increasing resource block index. If the boundary of the resource block set is reached in the direction of increasing resource block index, continue filling the SSB from the anchor point SSB in the direction of decreasing resource block index until N SSBs are filled.

[0087] Starting from the anchor point SSB, fill the SSB in the direction of decreasing resource block index. If the boundary of the resource block set is reached in the direction of decreasing resource block index, continue filling the SSB from the anchor point SSB in the direction of increasing resource block index until N SSBs are filled.

[0088] Starting from the anchor point SSB, the SSBs are filled synchronously and symmetrically in both increasing and decreasing directions of the resource block index until N SSBs are filled. If any direction reaches the boundary of the resource block set, the filling in the direction is stopped.

[0089] Starting from the anchor point SSB, SSBs are filled synchronously and symmetrically in both increasing and decreasing directions of the resource block index until N SSBs are filled. If the number of SSBs filled in any direction reaches the number of SSBs corresponding to the direction, filling in the direction is stopped.

[0090] According to the sequence number of the anchor SSB in the current resource block set and the total number of SSBs in the current resource block set, determine the number of SSBs N1 in the increasing direction of the anchor SSB resource block index and the number of SSBs N2 in the decreasing direction of the resource block index, and fill the corresponding number of SSBs in the increasing and decreasing directions of the resource block index according to N1 and N2 respectively.

[0091] The interval between the newly filled SSB and the adjacent SSB is the interval between two adjacent SSBs in the configuration parameters.

[0092] In one embodiment, the at least one resource block set is determined by configuration parameters, and the configuration parameters include at least one of the following: the number of resource block sets; the frequency domain configuration of the resource pool; the frequency domain configuration of the carrier; the frequency domain configuration of the bandwidth part.

[0093] In one embodiment, the configuration parameter includes a position of an anchor resource block set and / or a position of the anchor resource block set in the at least one resource block set.

[0094] In one embodiment, the configuration parameters include at least one of the following: the mapping direction in the resource block set; the number of resource block sets corresponding to the mapping direction; the number of SSBs in the resource block set; the interval between adjacent SSB resources; the frequency domain position of the anchor SSB in the current resource block set; the frequency domain position of the first starting SSB in the current resource block set; the frequency domain position of the center frequency points of all SSB valid RBs in the current resource block set in the current resource block set.

[0095] The apparatus further includes a resource block set determining unit configured to be one of the following:

[0096] The resource block set is mapped starting from the anchor resource block set in a direction of increasing resource block set index and / or resource block index in the resource block set. If the direction of increasing resource block set index and / or resource block index in the resource block set reaches the boundary of the bandwidth where the resource block set is located, the resource block set is continued to be mapped starting from the anchor resource block set in a direction of decreasing resource block set index and / or resource block index in the resource block set until M resource block sets are mapped.

[0097] The resource block set is mapped starting from the anchor resource block set in a direction of decreasing resource block set index and / or resource block index in the resource block set; if the direction of decreasing resource block set index and / or resource block index in the resource block set reaches the boundary of the bandwidth where the resource block set is located, the resource block set is continued to be mapped starting from the anchor resource block set in a direction of increasing resource block set index and / or resource block index in the resource block set until M resource block sets are mapped.

[0098] Starting from the anchor resource block set, the resource block set is synchronously and symmetrically mapped in two directions of increasing and decreasing resource block indexes and / or resource block indexes in the resource block set until M resource block sets are mapped. If any direction reaches the boundary of the bandwidth where the resource block set is located, the mapping in the direction is stopped.

[0099] Starting from the anchor resource block set, the resource block set is synchronously and symmetrically mapped in two directions of increasing and decreasing resource block indexes and / or resource block indexes in the resource block set until M resource block sets are filled. If the number of resource block sets filled in any direction reaches the number of resource block sets corresponding to the direction, the filling in the direction is stopped.

[0100] In one embodiment, the bandwidth of the resource block set includes the resource pool frequency domain bandwidth, the bandwidth portion, the carrier bandwidth, and the current physical side link control channel PSCCH or physical side link shared channel PSSCH transmission bandwidth.

[0101] In one embodiment, the configuration parameter includes an offset of the repeated SSB relative to a boundary of the resource block set or a center of the resource block set.

[0102] The resource blocks corresponding to the repeated SSBs are all within the resource block set.

[0103] In one embodiment, the determination module 210 is configured to:

[0104] In different resource block sets, determining the position of the first repeated SSB according to the offset;

[0105] The position of the non-first repeated SSB is determined according to the position of the first repeated SSB and the gap value.

[0106] In one embodiment, the configuration parameters further include a repetition direction of the non-first repeated SSB relative to the first repeated SSB.

[0107] In one embodiment, the configuration parameters further include an interval value of repeated SSBs, and the interval value is greater than 0 or less than 0.

[0108] In one embodiment, among the candidate values ​​of the gap value, the number of candidate values ​​smaller than 0 is less than or equal to the number of candidate values ​​greater than 0.

[0109] In one embodiment, the configuration parameters further include the number of repeated SSBs.

[0110] In one embodiment, the determination module 210 is further configured to:

[0111] When any repeated SSB reaches the boundary of the resource block set, the sum of the resource block number and the gap value of the characteristic resource block in the repeated SSB is modulo the function value of a specified function to obtain the position of the characteristic resource block in the next repeated SSB, wherein the specified function is a function of adding one or subtracting one to the number of resource blocks in the resource block set.

[0112] In one embodiment, the sizes of different resource block sets are unequal;

[0113] The determination module 210 is configured as follows:

[0114] In each resource block set, the position of the designated SSB is determined according to the offset.

[0115] The position of the repeated SSB in the non-first resource block set is determined according to the position of the specified SSB in the first resource block set and the gap value.

[0116] In one embodiment, the designated SSB satisfies:

[0117] The repeated SSBs in the resource block set are not in the guard band.

[0118] In one embodiment, the determination module 210 is configured to:

[0119] When the repeated SSB in the non-first resource block set includes T resource blocks in the guard band and T is less than a set threshold, the SSB in the guard band is discarded, and the repeated SSBs except the SSB in the guard band are transmitted on the resource block set within the selected bandwidth according to the repetition pattern.

[0120] In one embodiment, the determination module 210 is configured to:

[0121] In the case where the repeated SSB in the non-first resource block set includes T resource blocks in the guard band, the gap value is adjusted to a maximum value whose absolute value is greater than 0 and meets the set requirements, and the set requirements include that the repeated SSB in the non-first resource block set is not in the guard band.

[0122] In one embodiment, adjusting the gap value to a maximum value that is greater than 0 in absolute value and meets the requirements includes:

[0123] Reduce the gap value by floor({A+B} / (N-1)), where A is the number of resource blocks in the guard band near the upper boundary of the non-first resource block set, B is the number of resource blocks in the guard band near the lower boundary of the non-first resource block set, N is the number of repeated SSBs, and floor is rounded down.

[0124] The synchronization signal block transmission device proposed in this embodiment and the synchronization signal block transmission method proposed in the above embodiment belong to the same inventive concept. The technical details not described in detail in this embodiment can be referred to any of the above embodiments, and this embodiment has the same beneficial effects as executing the synchronization signal block transmission method.

[0125] An embodiment of the present application also provides a communication node. Figure 10 is a schematic diagram of the hardware structure of a communication node provided by an embodiment. As shown in Figure 10, the communication node provided by the present application includes a processor 310 and a memory 320; the processor 310 in the communication node can be one or more, and Figure 10 takes one processor 310 as an example; the memory 320 is configured to store one or more programs; the one or more programs are executed by the one or more processors 310, so that the one or more processors 310 implement the synchronization signal block transmission method as described in the embodiment of the present application.

[0126] The communication node further includes: a communication device 330 , an input device 340 and an output device 350 .

[0127] The processor 310 , memory 320 , communication device 330 , input device 340 and output device 350 in the communication node may be connected via a bus or other means. FIG10 takes the bus connection as an example.

[0128] The input device 340 may be used to receive input digital or character information and generate key signal input related to user settings and function control of the communication node. The output device 350 may include a display device such as a display screen.

[0129] The communication device 330 may include a receiver and a transmitter. The communication device 330 is configured to perform information transmission and reception communication according to the control of the processor 310.

[0130] The memory 320, as a computer-readable storage medium, can be configured to store software programs, computer executable programs, and modules, such as the program instructions / modules corresponding to the synchronization signal block transmission method described in the embodiment of the present application (for example, the determination module 210 and the transmission module 220 in the synchronization signal block transmission device). The memory 320 may include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application required for at least one function; and the data storage area may store data created according to the use of the communication node. In addition, the memory 320 may include a high-speed random access memory and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other non-volatile solid-state storage device. In some instances, the memory 320 may further include a memory remotely arranged relative to the processor 310, and these remote memories may be connected to the communication node via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0131] An embodiment of the present application further provides a storage medium storing a computer program, which, when executed by a processor, implements the synchronization signal block transmission method described in any of the embodiments of the present application. The method comprises: determining, based on configuration parameters, a repetition pattern of repeated SSBs on at least one resource block set, the repeated SSBs comprising N SSBs, where N is a positive integer; and transmitting the repeated SSBs on the resource block set within a selected bandwidth according to the repetition pattern.

[0132] The computer storage medium of the embodiment of the present application can adopt any combination of one or more computer-readable media.Computer-readable media can be computer-readable signal media or computer-readable storage media.Computer-readable storage media can be, for example, but not limited to: electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices or devices, or any combination of the above.More specific examples (non-exhaustive list) of computer-readable storage media include: electrical connections with one or more wires, portable computer disks, hard disks, random access memories (RAM), read-only memories (ROM), erasable programmable read-only memories (EPROM), flash memories, optical fibers, portable CD-ROMs, optical storage devices, magnetic storage devices, or any suitable combination of the above.Computer-readable storage media can be any tangible medium containing or storing a program, which can be used by an instruction execution system, device or device or used in combination with it.

[0133] A computer-readable signal medium may include a data signal propagated in baseband or as part of a carrier wave, carrying computer-readable program code. Such a propagated data signal may take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. A computer-readable signal medium may also be any computer-readable medium other than a computer-readable storage medium that can transmit, propagate, or transport a program for use by or in conjunction with an instruction execution system, apparatus, or device.

[0134] The program code contained on the computer-readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wire, optical cable, radio frequency (RF), etc., or any suitable combination of the foregoing.

[0135] The computer program code for performing the operations of the present application can be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, C++, and also conventional procedural programming languages ​​such as "C" language or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as an independent software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer can be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or can be connected to an external computer (e.g., using an Internet service provider to connect via the Internet).

[0136] The above description is merely an exemplary embodiment of the present application and is not intended to limit the scope of protection of the present application.

[0137] It will be understood by those skilled in the art that the term user terminal covers any suitable type of wireless user equipment, such as a mobile phone, a portable data processor, a portable web browser or a vehicle-mounted mobile station.

[0138] In general, various embodiments of the present application may be implemented in hardware or dedicated circuits, software, logic, or any combination thereof. For example, some aspects may be implemented in hardware, while other aspects may be implemented in firmware or software that can be executed by a controller, microprocessor, or other computing device, although the present application is not limited thereto.

[0139] Embodiments of the present application may be implemented by executing computer program instructions by a data processor of a mobile device, for example, in a processor entity, or by hardware, or by a combination of software and hardware. The computer program instructions may be assembly instructions, instruction set architecture (ISA) instructions, machine instructions, machine-dependent instructions, microcode, firmware instructions, state setting data, or source code or object code written in any combination of one or more programming languages.

[0140] The block diagram of any logical flow in the drawings of this application may represent program steps, or may represent interconnected logical circuits, modules and functions, or may represent a combination of program steps and logical circuits, modules and functions. A computer program may be stored on a memory. The memory may be of any type suitable for the local technical environment and may be implemented using any suitable data storage technology, such as but not limited to read-only memory (ROM), random access memory (RAM), optical storage devices and systems (digital versatile discs (DVD) or compact disks (CD), etc.). Computer-readable media may include non-transitory storage media. The data processor may be of any type suitable for the local technical environment, such as but not limited to a general-purpose computer, a special-purpose computer, a microprocessor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) and a processor based on a multi-core processor architecture.

[0141] The above description of exemplary embodiments of the present application has been provided by way of exemplary and non-limiting examples. However, various modifications and adaptations of the above embodiments will be apparent to those skilled in the art, when considered in conjunction with the accompanying drawings and the appended claims, without departing from the scope of the present application. Therefore, the proper scope of the present application will be determined by reference to the appended claims.

Claims

1. A synchronization signal block transmission method, comprising: Determine a repetition pattern of a repeated synchronization signal block SSB on at least one resource block set according to the configuration parameters, wherein the repeated SSB includes N SSBs, where N is a positive integer; The repeated SSBs are transmitted on the set of resource blocks within a selected bandwidth according to the repetition pattern.

2. The method according to claim 1, wherein: The selected bandwidth includes at least one of the resource pool frequency domain bandwidth, the bandwidth portion bandwidth, the carrier bandwidth, the bandwidth of the current physical side link control channel PSCCH or the physical side link shared channel PSSCH transmission, and the bandwidth selected by the communication node.

3. The method according to claim 1, wherein: The configuration parameters are used to indicate the frequency domain position of the anchor SSB within the resource block set and the interval between two adjacent SSBs.

4. The method according to claim 3, wherein: The configuration parameters also include at least one of the following: a filling direction in the resource block set; a number of SSBs corresponding to the filling direction; a total number N of SSBs in the current resource pool set; a sequence number of the anchor SSB in the N SSBs in the current resource block set; The step of determining a repetition pattern of repeating the SSB on at least one resource block set according to the configuration parameter comprises one of the following: Filling SSBs from the anchor point SSB in the direction of increasing resource block indexes, and if the direction of increasing resource block indexes reaches the boundary of the resource block set, then continuing to fill SSBs from the anchor point SSB in the direction of decreasing resource block indexes until N SSBs are filled; Filling SSBs from the anchor point SSB in a direction of decreasing resource block indexes, and if the direction of decreasing resource block indexes reaches a boundary of the resource block set, then continuing to fill SSBs from the anchor point SSB in a direction of increasing resource block indexes until N SSBs are filled; Starting from the anchor point SSB, the SSBs are synchronously and symmetrically filled in both directions of increasing and decreasing the resource block index until N SSBs are filled, and if any direction reaches the boundary of the resource block set, the filling in the direction is stopped; Starting from the anchor point SSB, the SSBs are synchronously and symmetrically filled in both increasing and decreasing directions of the resource block index until N SSBs are filled. If the number of SSBs filled in any direction reaches the number of SSBs corresponding to the direction, the filling in the direction is stopped; According to the sequence number of the anchor SSB in the current resource block set and the total number of SSBs in the current resource block set, determine the number of SSBs N1 in the increasing direction of the anchor SSB resource block index and the number of SSBs N2 in the decreasing direction of the resource block index, and fill the corresponding number of SSBs in the increasing and decreasing directions of the corresponding resource block index according to N1 and N2 respectively; Among them, the interval between the newly filled SSB and the adjacent SSB is the interval between two adjacent SSBs in the configuration parameters.

5. The method according to claim 1, wherein: The at least one resource block set is determined by configuration parameters, and the configuration parameters include at least one of the following: the number of resource block sets; the frequency domain configuration of the resource pool; the frequency domain configuration of the carrier; the frequency domain configuration of the bandwidth part.

6. The method according to claim 5, wherein: The configuration parameters include a position of an anchor resource block set and / or a position of the anchor resource block set in the at least one resource block set.

7. The method according to claim 5, wherein: The configuration parameters include at least one of the following: mapping direction in the resource block set; the number of resource block sets corresponding to the mapping direction; the number of SSBs in the resource block set; the interval between adjacent SSB resources; the frequency domain position of the anchor SSB in the current resource block set; the frequency domain position of the first starting SSB in the current resource block set; The frequency domain position of the center frequency points of all SSB valid RBs in the current resource block set in the current resource block set; The step of determining a repetition pattern of repeating the SSB on at least one resource block set according to the configuration parameter comprises one of the following: Mapping the resource block set from the anchor resource block set in the direction of increasing resource block set index and / or resource block index in the resource block set, if the direction of increasing resource block set index and / or resource block index in the resource block set reaches the boundary of the bandwidth where the resource block set is located, then continuing to map the resource block set from the anchor resource block set in the direction of decreasing resource block set index and / or resource block index in the resource block set until M resource block sets are mapped; Mapping the resource block set from the anchor resource block set in a direction of decreasing resource block set index and / or resource block index in the resource block set, and if the direction of decreasing resource block set index and / or resource block index in the resource block set reaches the boundary of the bandwidth where the resource block set is located, then continuing to map the resource block set from the anchor resource block set in a direction of increasing resource block set index and / or resource block index in the resource block set, until M resource block sets are mapped; Starting from the anchor resource block set, synchronously and symmetrically map the resource block set to the resource block set index and / or the resource block index in the resource block set in both increasing and decreasing directions until M resource block sets are mapped, and if any direction reaches the boundary of the bandwidth where the resource block set is located, stop mapping in the direction; Starting from the anchor resource block set, the resource block set is synchronously and symmetrically mapped to the resource block set index and / or the resource block index in the resource block set in both increasing and decreasing directions until M resource block sets are mapped. If the number of resource block sets mapped in any direction reaches the number of resource block sets corresponding to the direction, the mapping in the direction is stopped.

8. The method according to claim 7, wherein: The bandwidth where the resource block set is located includes the resource pool frequency domain bandwidth, the bandwidth portion bandwidth, the carrier bandwidth, and the current physical side link control channel PSCCH or physical side link shared channel PSSCH transmission bandwidth.

9. The method according to claim 1, wherein: The configuration parameters include an offset of the repeated SSB relative to a boundary of the resource block set or a center of the resource block set; The resource blocks corresponding to the repeated SSBs are all within the resource block set.

10. The method according to claim 9, wherein: The step of determining a repetition pattern of repeated SSBs on at least one resource block set according to the configuration parameters includes: In different resource block sets, determining the position of the first repeated SSB according to the offset; The position of the non-first repeated SSB is determined according to the position of the first repeated SSB and the gap value.

11. The method according to claim 10, wherein: The configuration parameters also include a repetition direction of the non-first repeated SSB relative to the first repeated SSB.

12. The method according to claim 1, wherein: The configuration parameters also include a gap value of repeated SSB, and the gap value is greater than 0 or less than 0.

13. The method according to claim 12, wherein: Among the candidate values ​​of the gap value, the number of candidate values ​​less than 0 is less than or equal to the number of candidate values ​​greater than 0.

14. The method according to claim 1, wherein: The configuration parameters also include the number of repeated SSBs.

15. The method according to claim 10, wherein: The step of determining a repetition pattern of repeating the SSB on at least one resource block set according to the configuration parameters further includes: When any repeated SSB reaches the boundary of the resource block set, the sum of the resource block number and the gap value of the characteristic resource block in the repeated SSB is modulo the function value of a specified function to obtain the position of the characteristic resource block in the next repeated SSB, wherein the specified function is a function of adding one or subtracting one to the number of resource blocks in the resource block set.

16. The method according to claim 9, wherein: The sizes of different resource block sets are not equal; The step of determining a repetition pattern of repeated SSBs on at least one resource block set according to the configuration parameters includes: In each resource block set, determining a position of a designated SSB according to the offset; The position of the repeated SSB in the non-first resource block set is determined based on the position of the specified SSB in the first resource block set and the gap value.

17. The method according to claim 16, wherein: The specified SSB satisfies: The repeated SSBs in the resource block set are not in the guard band.

18. The method according to claim 16, wherein: Transmitting the repeated SSBs on the set of resource blocks within the selected bandwidth according to the repetition pattern comprises: When the repeated SSB in the non-first resource block set includes T resource blocks in the guard band and T is less than a set threshold, the SSB in the guard band is discarded, and the repeated SSBs except the SSB in the guard band are transmitted on the resource block set according to the repetition pattern.

19. The method according to claim 16, wherein: Transmitting the repeated SSBs on the set of resource blocks within the selected bandwidth according to the repetition pattern comprises: The repeated SSB in the non-first resource block set includes T resource blocks in the guard band In this case, the gap value is adjusted to a maximum value whose absolute value is greater than 0 and meets the set requirements, and the set requirements include that the repeated SSBs in the non-first resource block set are not in the protection band.

20. The method according to claim 19, wherein: The gap value is adjusted to a maximum value whose absolute value is greater than 0 and meets the requirements, including: Reduce the gap value by floor({A+B} / (N-1)), where A is the number of resource blocks in the guard band near the upper boundary of the non-first resource block set, B is the number of resource blocks in the guard band near the lower boundary of the non-first resource block set, N is the number of repeated SSBs, and floor is rounded down.

21. A communication node, comprising: memory, and one or more processors; The memory is configured to store one or more programs; When the one or more programs are executed by the one or more processors, the one or more processors implement the synchronization signal block transmission method as described in any one of claims 1-20.

22. A computer-readable storage medium, wherein a computer program is stored on the computer-readable storage medium, and when the program is executed by a processor, the synchronization signal block transmission method as described in any one of claims 1 to 20 is implemented.

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